Based on the webtoon of the same name, it tells the story of the lives of idols in the entertainment industry, centered around the secret romance between a member of a rookie girl group and a member of the top boy group in the industry.

After her dreams of debuting as an idol are dashed due to a tragic incident involving a trainee at her entertainment company, Lee Ma Ha (Jung Ji-so) supports herself by impersonating the solo singer La Ri Ma (Park Ji-yeon) at cheap events. She is given a second chance at stardom when Ji Hak (Danny Ahn), the former manager of the famed boy group SHAX, recruits her to join his new girl group Tea Party. Ma Ha suddenly finds herself thrust into the spotlight, using her La Ri Ma impression to gain Tea Party attention from the public; both positive and negative. Ma Ha repeatedly encounters Kwon Ryok (Lee Jun-young), SHAX's most popular member, at various idol events. Despite his successful career, Ryok is still haunted by the disappearance of group member Lee Eun Jo (Chani) during a concert three years prior. While initially annoyed by Ma Ha, he develops feelings for her and they start a secret relationship that puts their careers at risk. Lee Yu Jin (Jeong Yun-ho), Ma Ha's close friend and fellow idol, notices their budding romance and determines to protect Ma Ha from Ryok and lead his own group, Sparkling, to dethrone SHAX as the top boy group in the industry.—Wikipedia